Characterization of supersonic radiation diffusion waves
- AWE Aldermaston, Reading (United Kingdom)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Supersonic and diffusive radiation flow is an important test problem for the radiative transfer models used in radiation-hydrodynamics computer codes owing to solutions being accessible via analytic and numeric methods. We present experimental results with which we compare these solutions by studying supersonic and diffusive flow in the laboratory. Here, we present results of higher-accuracy experiments than previously possible studying radiation flow through up to 7 high-temperature mean free paths of low-density, chlorine-doped polystyrene foam and silicon dioxide aerogel contained by an Au tube. Measurements of the heat front position and absolute measurements of the x-ray emission arrival at the end of the tube are used to test numerical and analytical models. We find excellent absolute agreement with simulations provided that the opacity and the equation of state are adjusted within expected uncertainties; analytical models provide a good phenomenological match to measurements but are not in quantitative agreement due to their limited scope.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP); UK Ministry of Defence
- Grant/Contract Number:
- AC52-06NA25396; AC52-07NA273444; AC52-006NA25396
- OSTI ID:
- 1430025
- Alternate ID(s):
- OSTI ID: 1246414
- Report Number(s):
- LA-UR-18-22001; TRN: US1802991
- Journal Information:
- Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 159, Issue C; ISSN 0022-4073
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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